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SOHO Wireless Networking

SOHO Wireless Networking. SCATA Nov 2005 Dr Duncan Hancox. Summary. Intro to wireless networks Types of wireless Types of networking Basic wireless infrastructure Setting up Extending the network Extras Security. Types of Wireless. 802.11b – 11mbits/sec 802.11g – 54mb/sec

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SOHO Wireless Networking

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  1. SOHO Wireless Networking SCATA Nov 2005 Dr Duncan Hancox

  2. Summary • Intro to wireless networks • Types of wireless • Types of networking • Basic wireless infrastructure • Setting up • Extending the network • Extras • Security

  3. Types of Wireless • 802.11b – 11mbits/sec • 802.11g – 54mb/sec • 802.11g turbo / super g – 108 or 125 • 802.11a – 5ghz – not compatible • 802.11n – not standard (pre-n) but backward compatible with b/g

  4. Types of Wireless Networking • Peer to Peer – not considered here but has its uses to connect 2 machines • Infrastructure – uses 1 or more wireless access points (WAP)

  5. Basic Infrastructure To Internet ADSL Modem Wired ethernet Router Firewall WAP DHCP server Switch

  6. WAP WAP Single wired ethernet

  7. Broadband Router Switch Router Firewall Intranet ethernet To PCs Ethernet to internet / network Via broadband modem or Cable or satellite

  8. ADSL router modem switch To Internet Wired ethernet ADSL Modem Router Firewall WAP DHCP server Switch Typical single box solution for home

  9. Setting Up 1 WAP -Wireless card picks up the SSID automatically Or is configured manually -The WAPs DHCP server gives an IP Or is configured manually -Log into the WAP and change settings to suit Single wired ethernet

  10. Setting Up 2 WAP wired ethernet Compters needs to be same ip address range as WAP – boot the computer After connecting and plugging in to WAP if the WAP has a DHCP server Enabled Manually change the PCs wired etherenet IP address to suit the WAP Windows assigns a random IP address to ethernet when not connected and You will not see the WAP with this address!

  11. Extending the Range 1 • High power hardware • High gain antennas • Omnidirectional 5-7db • Directional 7-12db but expensive Antenna and connector may be unique to your WAP WAP

  12. Extending the Range 2 • Additional WAPs wired together WAP WAP Ethernet link Use the same SSID on both allows seamless roaming Use different radio channels for each WAP Use same security settings

  13. Extending the Range 3 • Wireless repeater / relay ADSL Router WAP Repeater Only works with the same manufacturer! And only with some models

  14. Network Extras • Print Servers • Wired or wireless • Slow • Poor printer feedback eg ink level • Hard drives / NAS • Slow

  15. Wireless Security 1 • SSID – name of the wireless network • Nothing to do with the workgroup name • If you turn of SSID broadcast, windows zero configuration utility will fail • WEP – weak • WPA – slightly better • MAC control • much better but can be spoofed • Stops guests easily connecting

  16. Wireless Security 2 • Change the SSID name to something cryptic and turn off SSID broadcasting • Disallow admin options from the broadband side of the router • Change the router login from default • Use WEP or WPA to discourages casual browsers • MAC control – best option to limit access

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